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 Class 11th Chapter :- 10 Working with table Primary key The table which contains primary key is known as master table. Foreign key It can be defined as field or combination of fields whose values are borrowed from another table. Foreign key field cannot contain a value that does not exist in its related primary key field. Conceptually there can be three major types of relationship between any tables of the database. • One to One • One to Many Many to Many Base has very important and interesting feature called Field Properties. Field properties determine how the values in the field are stored and displayed. Default value: Many times it may happen, that we want to store some predefined default value automatically in a particular field at the time of entering a new record in the table.  Choose the most appropriate option from those given below : (1) Which of the following operations cannot be performed on a record in database? (a) Insert (b) Delete (c) Hide (d) Update (2) Which of the fo

  The major impact of mobility came with the availability of laptop computers and wireless communication systems. With availability of communication technologies like Bluetooth, Wi-Fi, GPS etc. and Cellular data services like Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), General Packet Radio Service (GPRS) and now 3rd Generation (3G) the scenario has changed completely. This technology combined with nano technology has given rise to miniature devices. Smart phones and tablets are two such great inventions of this era.   Mobile Computing :- Smart mobile computing devices are indeed one of the game changing products of recent times.Some examples of mobile OS are Android, iOS, Symbian, Windows 8 etc. Wi-Fi  :- Wi-Fi is a wireless networking protocol that allows a Wi-Fi enabled devices to communicate without use of physical cables. General Packet Radio Service (GPRS) :- This technology is used to allow the mobile phone connect to the Internet. 3G and

  “Database is a collection of related data items stored in an organized manner". DBMS can be defined as system designed for efficient storage, maintenance and retrieval of data. In short the DBMS software is what makes database practical and more usable. As we are aware of terms data, information, database and database management system, l Introduction to Base Base is Relational Database Management System (RDBMS) as it follows relational model. the organization of data into collections of two-dimensional tables called “relations.” Designed by E.F. Codd, relational model is based on the theory of sets and relations of mathematics. Base is a collection of related data objects known as Tables, Queries, Reports and Application Modules. Table :- Tables are organized in the form of columns and rows. To decide what information would be stored in a table and what would be the column titles, database designer needs to first decide entities in database. Queries : A question asked within th

Terminal :-  To open a terminal Press  CTRL+ ALT + t keys together(As Shorcut). Command 1. Calendar (cal) :- The cal command is used to display a calendar of any specific month or entire year. 2. Date (date) :- Another utility command is date; it is used to display the system date. 3. Calculator(bc) :- The bc command in linux is a command line calculator.     The ibase function allow us to set the numbering system. (a) obase = 16 (b) obase = 2 (c) sqrt = (256) 4. echo :- The echo command is used to display a message on the terminal. eg :- $echo Hi,Welcome to techonespot. 5. Changing password (passwd) :- It is used to change the password of the current login account by default. eg :- $passwd 6.Clearing the Screen (clear) :- we have one simple solution for this problem, use the clear command to remove data on the screen. 7. Present Working Directory (pwd) :- The directory where we are located at that moment is known as current directory or present working directory. To know the current

Chapter 1 :- Introduction to Multimedia Communication is an integral part of our life. We use various means of communication like radio, newspaper, television, theatre, movies, internet and others. Multimedia  The term multimedia has been coined from two terms : multiple and media.In other words, multimedia is a combination of different media elements like text, audio, graphics, video and animation. Multimedia is now-a-days used in every field like education, theatre, advertising, fashion, gaming to name a few. Text  Text is used to communicate information to the user.Text can be of any type, a word, a single line, or a paragraph.The textual data for multimedia can be developed using any text editor. The text can have different type, size, color and style to suit the professional requirement of the multimedia software.  Audio  Sound is the most important element of multimedia.The term sound is used in the analog form, and the digitized form of the sound is called audio. .wav is the mos